CN112331983A

CN112331983A - Battery module, device and failure processing method of failure battery monomer

Info

Publication number: CN112331983A
Application number: CN201911205489.5A
Authority: CN
Inventors: 王鹏; 陈兴地; 谢名迪; 周灵刚; 孙占宇; 吴凯
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2021-02-05
Anticipated expiration: 2039-11-29
Also published as: EP3930083A4; US20220021033A1; CN112331983B; US20230170535A1; KR102517184B1; US11588186B2; JP2022549026A; KR20220090550A; JP7256335B2; EP3930083A1; WO2021104332A1

Abstract

The application relates to a battery module, a device and a failure processing method of a failure battery monomer, wherein the battery module comprises: the battery monomer arranges the structure, include a plurality of battery monomers arranged along length direction, the battery monomer includes the electrode terminal, the electrode terminal is arranged along length direction, and towards the width direction, the battery monomer includes the dead battery monomer; the battery cell arrangement structure comprises a box body and a battery cell arrangement structure, wherein the box body is provided with an accommodating cavity; the mounting beam is positioned in the accommodating cavity and positioned at the end part of the battery monomer arrangement structure along the width direction; the pressing plate is at least partially positioned at the end part of the battery monomer arrangement structure along the height direction and is detachably connected with the mounting beam; a conductive member connecting the positive terminal and the negative terminal of the failed battery cell; wherein at least a portion of the conductive member is positioned between the mounting beam and the platen in the height direction. The connection operation between the conductive member and the electrode terminal of the failed battery cell is facilitated, so that the maintenance process can be simplified and the maintenance cost can be reduced.

Description

Battery module, device and failure processing method of failure battery monomer

Technical Field

The application relates to the technical field of energy storage devices, in particular to a battery module, a device and a failure processing method of a failed battery unit.

Background

The battery module comprises a plurality of battery cells which are stacked mutually, and the battery cells are electrically connected, so that the output of the electric energy of the battery module is realized, and the power is supplied to electric equipment. In the process of charging and discharging the battery monomer, the risk of failure exists, and when a certain battery monomer fails, the whole circuit of the battery module fails, so that the battery module cannot work normally. At present, when battery monomer broke down, generally adopted the mode of changing whole battery module to solve, but, when certain battery monomer trouble of this battery module, other battery monomer still can normally work, and the waste of resource is caused to the mode of directly changing whole battery module, and the required time of battery module dismouting is longer, reduces work efficiency.

Disclosure of Invention

The application provides a battery module, a device and a failure processing method of a failed battery monomer, which can simplify the maintenance process of the battery module, reduce the maintenance cost and improve the working efficiency of the battery module.

A first aspect of embodiments of the present application provides a battery module, including:

the battery cell arrangement structure comprises a plurality of battery cells arranged along the length direction of the battery module, the battery cells comprise electrode terminals, the electrode terminals are arranged along the length direction and face the width direction of the battery module, and the battery cells comprise failure battery cells;

the battery cell arrangement structure comprises a box body, a battery cell arrangement structure and a battery cell, wherein the box body is provided with an accommodating cavity;

the mounting beam is positioned in the accommodating cavity, positioned at the end part of the battery monomer arrangement structure along the width direction and provided with a second upper end surface along the height direction of the battery module;

the pressing plate is at least partially positioned at the end part of the battery monomer arrangement structure along the height direction, and the pressing plate is detachably connected with the mounting beam;

a conductive member connecting a positive terminal and a negative terminal of the failed battery cell;

wherein, along the height direction, at least part of the conductive component is positioned between the second upper end surface and the highest point of the pressing plate.

In one possible design, the pressing plate includes a body portion and a connection portion, the body portion being located at an end portion of the cell arrangement structure in the height direction;

one end of the connecting part is connected with the body part, and the other end of the connecting part is detachably connected with the mounting beam.

In one possible design, the battery cell on the uppermost layer has a first upper end surface in the height direction, and the body part is connected to the first upper end surface;

the height of the first upper end surface is greater than that of the second upper end surface;

the connecting part comprises a first connecting section, a second connecting section and a transition section, and the transition section is connected with the first connecting section and the second connecting section;

the first connecting section is connected with the body part, or the first connecting section is connected with the body part and the first upper end surface;

the second connecting section is detachably connected with the second upper end face.

In one possible design, the battery cell has a top cover plate, the electrode terminal) is provided to the top cover plate;

along the width direction, a preset distance is reserved between the top cover plate and the mounting beam;

when the pressing plate is connected with the mounting beam, the box body, the mounting beam and the pressing plate form an accommodating space in an enclosing mode, and the conductive part is located in the accommodating space.

In one possible design, the body portion is bonded to the first upper end face;

the first connecting section is in lap joint with the body part, and the lap joint length of the first connecting section and the body part is 10-200 mm.

In one possible design, the battery module includes a row of the battery cell arrangement structures along a width direction, and the body portion does not extend beyond the battery cell arrangement structures along the width direction;

along width direction, battery module includes two rows battery monomer arrangement structure, and two rows battery monomer arrangement structure's electrode terminal deviates from each other, along width direction, the one end of this somatic part does not surpass one row battery monomer arrangement structure, and the other end does not surpass another row battery monomer arrangement structure.

In one possible design, the battery module further includes a first connection tab and a second connection tab, the first connection tab and the second connection tab being connected with electrode terminals of the battery cells;

the conductive part is connected with a first connecting sheet and a second connecting sheet which are connected with the failed battery cell;

along the height direction, at least part of the first connecting sheet and the second connecting sheet is located between the second upper end surface and the highest point of the pressure plate.

In one possible design, along the height direction, the connection position of the conductive part and the first connecting piece is located between the second upper end surface and the pressure plate, and the connection position of the conductive part and the second connecting piece is located between the second upper end surface and the highest point of the pressure plate.

In one possible design, the single battery cell arrangement structure includes a first single battery cell arrangement structure and a second single battery cell arrangement structure, and the first single battery cell arrangement structure is located above the second single battery cell arrangement structure along the height direction;

the first connecting sheet is connected with the single batteries of the first single battery arrangement structure and the single batteries of the second single battery arrangement structure, and the second connecting sheet is connected with the single batteries of the first single battery arrangement structure and the single batteries of the second single battery arrangement structure.

A second aspect of embodiments of the present application provides an apparatus using a battery cell as a power source, the apparatus including:

a power source for providing a driving force to the device; and the combination of (a) and (b),

a battery module as described above configured to provide electrical energy to the power source.

A third aspect of the embodiments of the present application provides a method for processing failure of a failed battery cell, where a battery cell arrangement structure includes a plurality of battery cells, the battery cells include the failed battery cell, the failed battery cell includes a positive terminal and a negative terminal, an installation beam is disposed at an end of the battery cell arrangement structure in a width direction, and a pressing plate is disposed at an end of the battery cell arrangement structure in a height direction;

the failure processing method comprises the following steps:

removing at least a portion of the platen from the mounting beam;

and electrically connecting the positive terminal and the negative terminal of the failed battery cell through the conductive member.

In one possible design, the pressure plate includes a body portion and a connecting portion, and the failure handling method includes, when detaching at least a portion of the pressure plate from the mounting beam:

detaching the connecting portion from the mounting beam.

In one possible design, when the two electrode terminals of the failed battery cell are respectively connected with the first connecting piece and the second connecting piece, and the positive electrode terminal and the negative electrode terminal of the failed battery cell are electrically connected through the conductive part, the failure processing method includes:

the first connection tab and the second connection tab to be connected with the failed battery cell are electrically connected through the conductive member.

In one possible design, after electrically connecting the positive terminal and the negative terminal of the failed battery cell through the conductive member, the failure processing method further includes:

mounting at least a portion of the pressure plate detached from the mounting beam to the mounting beam.

Therefore, when one or more battery cells are invalid in the working process of the battery module, only the electrode terminals of the invalid battery cells are needed to be connected through the conductive parts, the whole battery module is not needed to be repaired or replaced, when the battery module is applied to a vehicle, the vehicle can be directly repaired in a 4S shop, the whole vehicle is not needed to be returned to a factory for processing, or a new battery module is not needed to be replaced, so that the working efficiency of the battery module is improved, the maintenance flow is simplified, and the maintenance cost is reduced. Meanwhile, after the treatment, the current passing through the invalid battery monomer is smaller, so that the battery capacity of the battery module is not greatly reduced, and the battery module can normally work.

Meanwhile, when at least part of the conductive part is positioned above the mounting beam, the connection operation of the conductive part and the electrode terminal of the failed battery cell is convenient to realize, namely the mounting beam does not need to be dismounted, and the arrangement structure of the battery cells does not need to be taken out of the accommodating cavity, so that the maintenance process can be further simplified, and the maintenance cost is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of an apparatus provided herein;

FIG. 2 is a schematic structural view of the battery module of FIG. 1 in an exemplary embodiment in which a pressure plate is coupled to the mounting beams;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is an exploded view of FIG. 2;

FIG. 5 is a schematic view of the construction of the joint portion of FIG. 2 with the pressure plate removed;

FIG. 6 is a schematic structural view of the connection of the first connection tab and the second connection tab of FIG. 5 by a conductive member;

FIG. 7 is an enlarged view of a portion II of FIG. 6;

FIG. 8 is an exploded view of FIG. 2, wherein a conductive member connects the first tab and the second tab;

FIG. 9 is an enlarged view of a portion III of FIG. 8;

FIG. 10 is a cross-sectional view of FIG. 3;

FIG. 11 is an enlarged view of a portion IV of FIG. 10 in a first embodiment;

FIG. 12 is an enlarged view of a portion IV of FIG. 10 in a second embodiment;

fig. 13 is a structural view illustrating a battery cell arrangement structure in the battery module of fig. 2 in another embodiment;

FIG. 14 is an enlarged view of a portion V of FIG. 13;

FIG. 15 is an enlarged view of a portion VI of FIG. 13;

fig. 16 is a schematic structural view of a conductive member.

Reference numerals:

d-means;

an M-cell module;

1-arrangement structure of battery monomers;

11-a first battery cell arrangement structure;

12-a second cell arrangement structure;

13-a battery cell;

131-electrode terminals;

131 a-positive terminal;

131 b-negative terminal;

132-a first upper end face;

133-failed battery cell;

134-top cover plate;

2-a first connecting piece;

3-a second connecting sheet;

4, pressing a plate;

41-a body portion;

42-a connecting portion;

421-a first connection segment;

422-a second connection section;

423-transition section;

424-briquetting;

5-a box body;

51-a containment chamber;

52-mounting the beam;

521-a second upper end face;

53-an accommodation space;

6-a conductive member;

61-mating grooves;

611-side walls;

612-top wall.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or indirectly on" or "under" the other element via an intermediate element.

The embodiment of the application provides a device D and a battery module M using a battery cell 13 as a power supply, wherein the device D using a battery cell 1 as a power supply comprises a vehicle, a ship, a small airplane and other mobile devices, the device D comprises a power source for providing driving force for the device D, and the power source can be configured as the battery module M for providing electric energy for the device D. The driving force of the device D may be electric energy, or may include electric energy and other energy sources (e.g., mechanical energy), the power source may be the battery module M, and the power source may also be the battery module M and the engine, etc. Therefore, a device D that can use the battery cell 13 as a power source is within the scope of the present application.

As shown in fig. 1, taking a vehicle as an example, the device D in the embodiment of the present application may be a new energy vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle can comprise a battery module M and a vehicle main body, wherein the battery module M is arranged on the vehicle main body, the vehicle main body is also provided with a driving motor, the driving motor is electrically connected with the battery module M, the battery module M provides electric energy, and the driving motor is connected with wheels on the vehicle main body through a transmission mechanism so as to drive the vehicle to move. Specifically, the battery module M may be horizontally disposed at the bottom of the vehicle body.

As shown in fig. 2, the battery module M may include a case 5 (the case 5 shown in fig. 2 is a structure in which an upper cover is omitted), and the case 5 has a receiving cavity 51, the receiving cavity 51 is used for placing the battery cell 13, and a plurality of battery cells 13 are stacked in the receiving cavity 51. The type of the box 5 is not limited, and may be a frame-shaped box, a disc-shaped box, or a box-shaped box. Specifically, as in the embodiment shown in fig. 2, the case 5 may be a case 5 of a rectangular parallelepiped structure.

More specifically, as shown in fig. 4, the battery module M includes one or more battery cell arrangement structures 1, and the battery cell arrangement structure 1 includes a plurality of battery cells 13 arranged in the length direction X, i.e., in the battery cell arrangement structure 1, the electrode terminals 131 of the respective battery cells 13 are arranged in the length direction X and face the width direction Y. Meanwhile, in the battery module M, along the width direction X, the battery module M may include one battery cell arrangement structure 1, and may also include two battery cell arrangement structures 1, at this time, the electrode terminals 131 of the battery cells 13 in the two battery cell arrangement structures 1 deviate from each other, and bottoms of the two are close to each other.

In addition, in the battery module M, along the height direction Z, a layer of battery cell arrangement structure 1 may be included, or two layers of battery cell arrangement structures 1 may be included, where each layer may include two battery cell arrangement structures 1 arranged along the width direction Y. In the embodiment shown in fig. 4, the battery module M includes two layers of the battery cell arrangement structure 1, respectively, a first battery cell arrangement structure 11 and a second battery cell arrangement structure 12, which are stacked on each other in the height direction Z.

Meanwhile, each of the battery cells 13 includes a positive terminal 131a and a negative terminal 131b, in the battery module M, a plurality of battery cells 13 are electrically connected to form a circuit of the battery module M, and each of the battery cells 13 may be connected in series and/or in parallel, and the battery cells 13 are connected by connecting pieces (the first connecting piece 2 and the second connecting piece 3), for example, when the battery cells 13 are connected in series, the positive terminal 131a of one battery cell 13 and the negative terminal 131b of another battery cell 13 are connected by the connecting pieces.

In the working process of the battery module M, each battery cell 13 is continuously charged and discharged, and in the charging and discharging process, the battery cell 13 has a risk of failure (for example, thermal runaway), so that the battery cell 13 cannot normally work, and at the moment, the circuit of the battery module M fails to normally supply power. To solve this technical problem, the present application solves the technical problem by removing the failed battery cell 133 from the circuit and re-forming the circuit.

Specifically, as shown in fig. 4 to 6, the case 5 of the battery module M further includes a mounting beam 52, and the mounting beam 52 is located in the accommodating cavity 51 of the case 5 and located at an end of the cell arrangement structure 1 in the width direction Y, that is, the electrode terminal 113 of the cell arrangement structure 1 faces the mounting beam 52. Simultaneously, this battery module M can also include clamp plate 4, and this clamp plate 4 is located battery monomer arrangement structure 1 along the tip of height direction Z partly at least, and this clamp plate 4 can dismantle with installation roof beam 52 and be connected, and the two is connected the back, and this clamp plate 4 can be used for providing along height direction Z spacing to battery monomer arrangement structure 13 to improve its stability in holding chamber 51.

Meanwhile, the battery module M may further include a conductive member 6, the conductive member 6 being used to directly or indirectly connect the positive terminal 131a and the negative terminal 131b of the failed battery cell 133, wherein the conductive member 6 may be connected to the electrode terminal 131 of the defective cell 133 inside the defective cell 133, or may be connected to the electrode terminal 131 of the defective cell 133 outside the defective cell 133, and the conductive member 6 may be directly connected to the electrode terminal 131 of the failed battery cell 133, or, when the electrode terminal 131 is connected to the connection tab, the conductive member 6 may be connected to a connection tab connected to the electrode terminal 131, so that the short circuit between the positive terminal 131a and the negative terminal 131b of the failed cell 133 can be achieved through the conductive member 6, so that the failed cell 133 is removed from the charge and discharge circuit of the battery module M.

In addition, the single battery 13 according to the embodiment of the present application may be a soft package battery, a square battery, a cylindrical battery, or the like, and accordingly, the electrode terminal 131 (including the positive electrode terminal 131a and the negative electrode terminal 131b) of the single battery 13 may be the electrode terminal 131 of the soft package battery, or the electrode terminal 131 of the square battery and the cylindrical battery, and meanwhile, when the pole and the tab of the single battery 13 are connected through the adaptor piece, the electrode terminal 131 may also be a structure in which the pole and the adaptor piece are connected.

Therefore, when one or more of the battery cells 13 are out of service in the working process of the battery module M, the electrode terminals 131 of the out-of-service battery cells 133 are only required to be connected through the conductive parts 6, the whole battery module M does not need to be replaced, and when the battery module M is applied to a vehicle, the vehicle can be directly maintained and repaired in a 4S shop without returning the whole vehicle to a factory for processing or replacing a new battery module M, so that the working efficiency of the battery module M is improved, and the maintenance flow and the maintenance cost are simplified. Meanwhile, after the above process, the current passing through the failed battery cell 133 is small, so that the battery capacity of the battery module M is not greatly reduced, and the battery module M can normally operate.

In addition, for the structure that the battery monomer 13 is adhered to the accommodating cavity 51 of the box body 5 through the structural adhesive, when a certain battery monomer 13 fails, the operation of detaching the failed battery monomer 133 from the accommodating cavity 51 is not easy to be realized, so that the processing mode of short-circuiting the failed battery monomer 133 by the conductive component 6 in the embodiment has the advantages of convenient operation and high efficiency.

Meanwhile, for the battery module M shown in fig. 6 and 7, at least part of the conductive member 6 is located between the mounting beam 52 and the highest point of the pressing plate 4 in the height direction Z of the battery module M, where the highest point of the pressing plate 4 refers to: in the height direction Z, the highest position of the pressing plate 4 (based on the same plane, for example, based on the bottom surface of the box 5 of the battery module M), taking the embodiment shown in fig. 11 and 12 as an example, when the pressing plate 4 includes the main body 41 and the connecting portion 42, wherein the main body 41 is of a flat plate structure (with the same height), the second connecting section 421 of the connecting portion 42 is overlapped above the main body 41, and at this time, the highest point of the pressing plate 4 is the second connecting section 421, therefore, in this embodiment, at least a part of the conductive component 6 is located between the second upper end surface 521 of the mounting beam 52 and the second connecting section 421 of the pressing plate 4, i.e. above the second upper end surface 521 (and not necessarily contacting with the second upper end surface 521), below the second connecting section 421 (and not necessarily contacting with the second connecting section 421), that is, the conductive member 6 may have no connection relationship with the mounting beam 52 and the pressing plate 4, or the conductive member 6 may be connected and insulated with the mounting beam 2 by another member, and the conductive member 6 may be connected and insulated with the second connection segment 421 by another member.

In this embodiment, when at least a portion of the conductive member 6 is located above the second upper end surface 521, the operation of attaching and detaching the conductive member 6 to and from the electrode terminal 131 of the failed battery cell 133 is facilitated, i.e., the mounting beam 52 does not need to be removed, and the battery cell arrangement structure 1 does not need to be taken out of the accommodating cavity 51, so that the maintenance process and the maintenance cost can be further simplified.

Specifically, as shown in fig. 6 and 7, the battery module M further includes a first connecting piece 2 and a second connecting piece 3, the first connecting piece 2 and the second connecting piece 3 are connected to the electrode terminal 131 of the battery cell 13, and the conductive member 6 connects the first connecting piece 2 and the second connecting piece 3 connected to the dead battery cell 133, that is, in the present embodiment, the conductive member 6 can indirectly connect the two electrode terminals 131 of the dead battery cell 133. At the same time, after connection, at least parts of the first connecting piece 2 and the second connecting piece 3 are located between the mounting beam 52 and the highest point of the pressure plate 4 in the height direction Z.

In this embodiment, when at least a portion of the first connecting piece 2 and the second connecting piece 3 connected to the electrode terminal 131 of the dead cell 133 is located above the second upper end surface 521 of the mounting beam 52, the conductive member 6 can be connected to the first connecting piece 2 and the second connecting piece 3 easily, and when the conductive member 6 is connected to the connecting pieces, the connecting area between the conductive member 6 and the connecting pieces is larger than when the conductive member 6 is directly connected to the electrode terminal 131, so that the flow area between the two can be increased, and the risk of the connection position having an excessively high temperature can be reduced.

More specifically, the connecting position of the conductive member 6 and the first connecting piece 2 is located between the mounting beam 52 and the pressing plate 4, and the connecting position of the conductive member 6 and the second connecting piece 3 is located between the highest points of the mounting beam 52 and the pressing plate 4 in the height direction Z, that is, the connecting position of the conductive member 6 and the first connecting piece 2 and the second connecting piece 3 is located above the second upper end surface 521 of the mounting beam 52, so that the connection between the conductive member 6 and the first connecting piece 2 and the second connecting piece 3 can be facilitated.

In another embodiment, as shown in fig. 13 to 15, the conductive member 6 is connected to the electrode terminal 131, specifically, when the dead cell 133 is located at the uppermost layer of the cell arrangement structure 1, the conductive member 6 can be directly connected to the electrode terminal 131 of the dead cell 133, as shown in fig. 14, since the positive terminal 131a of the dead cell 133 is connected to the first connecting piece 2 and the negative terminal 131b is connected to the second connecting piece 3, when the conductive member 6 is directly connected to the positive terminal 131a and the negative terminal 131b, at least a portion of the conductive member 6 is located between the two connecting pieces and the top cover of the dead cell 133 in the width direction Y, and thus can be connected to the positive terminal 131a and the negative terminal 131 b.

When the failed battery cell 133 is located at the battery cell arrangement structure 1 of the lower layer, the failed battery cell 133 is located below the second upper end surface 521 of the mounting beam 52, the conductive member 6 is not easily directly connected to the failed battery cell 133, and since the positive terminal 131a of the failed battery cell 133 is connected to the first connection piece 2 and the negative terminal 131b is connected to the second connection piece 3, and at the same time, the first connection piece 2 is also connected to the battery cell 11 located at the upper layer, and the second connection piece 3 is also connected to the battery cell 11 located at the upper layer, the conductive member 6 can also connect the electrode terminal 131 located at the upper layer and connected to the first connection piece 2 and the electrode terminal 131 connected to the second connection piece 3, thereby indirectly connecting the electrode terminal 131 of the failed battery cell 133.

Specifically, when the conductive member 6 is connected to the electrode terminal 131, the two may be welded, but of course, may be connected by other structures. For example, as shown in fig. 16, the conductive member 6 includes two fitting grooves 61 provided at intervals in the longitudinal direction X, and a distance between the two fitting grooves 61 is the same as a distance between two electrode terminals 131 to which the conductive member 6 is connected. Taking fig. 14 as an example, when the conductive member 6 connects the positive electrode terminal 131a and the negative electrode terminal 131b of the dead battery cell 133, at least a part of each of the two electrode terminals 131 is located in the corresponding fitting groove 61, thereby achieving connection between the conductive member 6 and the electrode terminal 131.

More specifically, the fitting groove 61 has a downward opening in the height direction Z and a top wall 62 disposed opposite to the opening, and at the same time, the fitting groove 61 includes two side walls 61 disposed opposite to each other in the length direction X, when at least a portion of the electrode terminal 131 is located in the fitting groove 61, the electrode terminal 131 abuts against the top wall 62, and the electrode terminal 131 also abuts against the two side walls 61, so that the electrode terminal 131 is fitted into the fitting groove 61, and the connection reliability between the conductive member 6 and the electrode terminal 131 is improved.

The conductive member 6 and the corresponding electrode terminal 131 may be connected by welding or by conductive paste.

In a specific embodiment, as shown in fig. 3 and 11, the pressing plate 4 may include a body portion 41 and a connecting portion 42, the body portion 41 is located at an end portion of the cell arrangement structure 1 along the height direction Z, one end of the connecting portion 42 is connected to the body portion 41, and the other end is detachably connected to the mounting beam 52, so that the connection between the pressing plate 4 and the mounting beam 52 is achieved.

It should be noted that, in the present embodiment, the connecting portion 42 of the pressing plate 4 and the mounting beam 52 may be directly connected along the height direction Z, and a rubber pad may also be included therebetween, that is, the connecting portion 42 and the mounting beam 52 may be connected through a rubber pad, so that when the battery module M vibrates, the rubber pad can buffer the vibration between the connecting portion 42 and the mounting beam 52, and improve the connection reliability between the pressing plate 4 and the mounting beam 52.

In addition, when the connecting portion 42 of the pressure plate 4 is detachably connected to the mounting beam 52, not only can the pressure plate 4 be mounted to the mounting beam 52 so as to improve the stability of the battery cell 13 in the housing chamber 51, but also the connecting portion 42 can be easily detached from the mounting beam 52 so that at least a part of the first connecting piece 2 and the second connecting piece 3 can be exposed from the mounting beam 52 so as to perform the connection of the first connecting piece 2 and the second connecting piece 3 through the conductive member 6. Meanwhile, when the body portion 41 of the pressing plate 4 is fixedly connected (e.g., adhered) to the battery cell 13, the connecting portion 42 detachably connected to the mounting beam 52 can be easily detached, so that the connection of the conductive member 6 to the first connecting piece 2 and the second connecting piece 3 can be easily achieved.

Specifically, as shown in fig. 11 and 12, the battery cell 13 at the uppermost layer has a first upper end surface 132 along the height direction Z, and the body portion 41 is connected to the first upper end surface 132, specifically, by structural adhesive, or by other means. Meanwhile, the mounting beam 52 has a second upper end surface 521 along the height direction Z, and the height of the first upper end surface 132 is greater than the height of the second upper end surface 521, that is, the first upper end surface 132 is located above the second upper end surface 521.

In addition, the connecting portion 42 may include a first connecting section 421, a second connecting section 422, and a transition section 423, wherein the transition section 423 connects the first connecting section 421 and the second connecting section 422 along the width direction Y, the first connecting section 421 connects the body portion 41, and the second connecting section 422 connects the mounting beam 52, so that the height of the first connecting section 421 is greater than the height of the second connecting section 422, and the transition section 423 extends along the height direction Z, so that the cross section of the connecting portion 42 is substantially in a Z shape, and the connecting portion 42 of this structure can facilitate connection with the mounting beam 52 and the body portion 41.

In the embodiment shown in fig. 11, the first connecting section 421 may be connected to the upper end surface of the main body 41 to increase the contact area therebetween, the first connecting section 421 may be overlapped on the upper end of the main body 41, and the first connecting section 421 and the main body 41 may be fixedly connected by a screw, or the first connecting section 421 and the main body 41 may be connected by a structural adhesive, and the second connecting section 422 may be detachably connected to the second upper end surface 521 of the mounting beam 52, and the first connecting section 422 and the second upper end surface may be locked by a bolt.

In the embodiment shown in fig. 12, the connecting portion 42 may further include a pressing piece 424, the pressing piece 424 is connected below the first connecting section 421, the thickness of the pressing piece 424 in the height direction Z is the same as that of the main body portion 41, when the first connecting section 421 is overlapped on the main body portion 41, the pressing piece 424 can abut against the first upper end surface 132 of the battery cell 13, that is, the first connecting section 421 is connected to both the main body portion 41 and the first upper end surface 132, and meanwhile, the second connecting section 422 is detachably connected to the second upper end surface 521 of the mounting beam 52. In this embodiment, the connection reliability of the connection portion 42 with the battery cell 13 and the body portion 41 is high.

In the above embodiments, the pressing plate 4 may include two connecting portions 42, and the two connecting portions 42 are connected to the two ends of the main body portion 41 along the width direction Y, so that the two ends of the pressing plate 4 along the width direction Y are connected to the mounting beams 52.

The first connecting section 421 overlaps the main body 41, and the overlapping length of the two is 10mm to 200mm, for example, the overlapping length may be 150mm or 180mm, and when the overlapping length of the two is longer, the connection reliability between the connecting portion 42 and the main body 41 is higher.

More specifically, as shown in fig. 11 and 12, the battery cell 13 has a top cover plate 134, the electrode terminal 131 is disposed on the top cover plate 134, and the top cover plate 134 and the mounting beam 52 have a predetermined distance therebetween along the width direction Y, and the predetermined distance is used for providing an electrical gap between the electrode terminal 131 of the battery cell 13 and the mounting beam 52, so as to prevent the battery cell 13 from being electrically connected to the mounting beam 52, and ensure that the battery module M can normally operate.

Meanwhile, when the pressing plate 4 is connected with the mounting beam 52, the box body 5, the mounting beam 52 and the pressing plate 4 enclose a containing space 53, the conductive part 6 is positioned in the containing space 53, and the containing space 53 can also facilitate the connection between the conductive part 6 and the first connecting piece 2 and the second connecting piece 3.

On the other hand, when the battery module M includes a row of the cell arrangement structure 1 in the width direction Y, the body portion 41 does not protrude beyond the cell arrangement structure 1 in the width direction Y, so that the body portion 41 does not interfere with the conductive member 6 connecting the first connecting piece 2 and the second connecting piece 3. Alternatively, as shown in the embodiment of fig. 10, when the battery module M includes two rows of the cell arrangement structures 1 along the width direction Y, one end of the main body 41 does not exceed one row of the cell arrangement structures 1 along the width direction Y, and the other end does not exceed the other row of the cell arrangement structures 2 along the width direction Y, that is, the width of the main body 41 is smaller than the sum of the widths of the two rows of the cell arrangement structures 1.

In the present embodiment, in the pressure plate 4, even if the body portion 41 is not removed, the body portion 41 does not affect the connecting operation of the conductive member 6 with the first connecting piece 2 and the second connecting piece 3.

In addition, as shown in the embodiment shown in fig. 8 and 9, along the height direction Z, the battery module M includes two layers of battery cell arrangement structures 1, specifically: first battery monomer arrangement structure 11 and second battery monomer arrangement structure 12, and along direction of height Z, this first battery monomer arrangement structure 11 is located second battery monomer arrangement structure 12's top, above-mentioned first connection piece 2 connects battery monomer 13 of first battery monomer arrangement structure 11 and battery monomer 13 of second battery monomer arrangement structure 12, second connection piece 3 connects battery monomer 13 of first battery monomer arrangement structure 11 and battery monomer 13 of second battery monomer arrangement structure 12, establish ties through first connection piece 2 and second connection piece 3 between battery monomer 13 of this first battery monomer arrangement structure 11 and the battery monomer 13 of second battery monomer arrangement structure 12 promptly, consequently, this first connection piece 2 sets up with second connection piece 3 along direction of height Z slope.

In this embodiment, in the first connection tab 2 and the second connection tab 3 connected to the battery cell 13 of the second battery cell arrangement structure 12 located at the lower layer, at least a part of each of the two connection tabs is located above the second upper end surface 521 of the mounting beam 52, so that the two connection tabs can be connected by the conductive member 6, that is, the connection manner enables the battery module M to include the two layers of battery cell arrangement structures 1, and when the battery cell 13 of the second battery cell arrangement structure 12 located at the lower layer fails, the failed battery cell 133 (located at the lower layer) can also be connected by the conductive member 6, so that the maintenance of the failed battery cell 133 can be realized without disassembling the battery cell arrangement structure 1.

In addition, an embodiment of the present application further provides a failure processing method for a failed battery cell 133, where the failure processing method includes the following steps:

s1: at least part of the press plate 4 is detached from the mounting beam 52.

In this step, after at least part of the pressing plate 4 is removed, at least part of the failed battery cell 131 can be exposed, so that the corresponding operation of the failed battery cell 131 can be facilitated.

S2: the positive terminal 131a and the negative terminal 131b of the dead battery cell 133 are electrically connected through the conductive member 6, wherein the conductive member 6 may directly connect the positive terminal 131a and the negative terminal 131b, or indirectly connect the positive terminal 131a and the negative terminal 131b (for example, connect through the first connecting piece 2 and the second connecting piece 3).

The conductive member 6 may be a metal sheet or the like, so as to realize a short circuit between the positive terminal 131a and the negative terminal 131b, and the cross-sectional area of the conductive member 6 should meet the overcurrent requirement of the battery module M, so as to avoid the over-temperature of the conductive member 6.

Specifically, as described above, the pressing plate 4 may include the body portion 41 and the connection portion 42, the body portion 41 is connected to the connection portion 42, and in the pressing plate 4, the body portion 41 is connected to the cell arrangement structure 1, and the connection portion 42 is connected to the mounting beam, so that the step S1 may specifically be:

s11: the connecting portion 42 is detached from the mounting beam 52.

In this embodiment, the connecting portion 42 is detachably connected to the mounting beam 52 and the body portion 41, so that when the defective battery cell 133 is maintained, the entire pressing plate 4 does not need to be detached, and at least a part of the defective battery cell 133 can be exposed only by detaching the connecting portion 42, thereby facilitating maintenance.

More specifically, the two electrode terminals 131 of the dead battery cell 133 are connected to the first connecting piece 2 and the second connecting piece 3, respectively, and therefore, the step S2 may specifically be:

s21: the first connection tab 2 and the second connection tab 3 connected to the failed battery cell 133 are electrically connected through the conductive member 6.

In this embodiment, the conductive part 6 is indirectly connected to the two electrode terminals 131 of the failed battery cell 133, so that the short circuit of the failed battery cell 133 is realized, and when the conductive part 6 is connected to the two connecting pieces, the connection area between the conductive part 6 and the two connecting pieces is large, so that the overcurrent area is increased, and the risk of the over-high temperature at the connection position between the conductive part 6 and the connecting pieces is reduced.

In addition, the conductive part 6 and the two connecting pieces may be connected by welding, or may be connected by other methods such as bonding and riveting.

More specifically, after the step 2, the failure handling method may further include:

s3: at least a part of the platen 4 detached from the mounting beam 52 is mounted to the mounting beam 52.

When at least a portion of the platen 4 detached from the mounting beam 52 in step S1 is the connecting portion 42, the step S3 may specifically be:

s31: the connecting portion 42 detached from the mounting beam 52 is attached to the mounting beam 52.

In this step, after the detached connecting portion 42 is remounted to the mounting beam 52, the maintenance of the failed battery cell 133 can be completed, and in the battery module M, the battery cell arrangement structure 1 can be limited by the pressing plate 4 and the mounting beam 52.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module (M), characterized in that the battery module (M) comprises:

a battery cell arrangement structure (1) including a plurality of battery cells (13) arranged in a length direction (X) of the battery module (M), the battery cells (13) including electrode terminals (131), the electrode terminals (131) being arranged in the length direction (X) and facing a width direction (Y) of the battery module (M), the battery cells (13) including failed battery cells (133);

the battery cell arrangement structure comprises a box body (5), wherein the box body (5) is provided with an accommodating cavity (51), and the battery cell arrangement structure (1) is positioned in the accommodating cavity (51);

a mounting beam (52), wherein the mounting beam (52) is positioned in the accommodating cavity (51), is positioned at the end part of the battery cell arrangement structure (1) along the width direction (Y), and is provided with a second upper end surface (521) along the height direction (Z) of the battery module (M);

the pressing plate (4), at least part of the pressing plate (4) is located at the end part of the battery cell arrangement structure (1) along the height direction (Z), and the pressing plate (4) is detachably connected with the mounting beam (52);

a conductive member (6), the conductive member (6) connecting a positive terminal (131a) and a negative terminal (131b) of the failed cell (133);

wherein, along the height direction (Z), at least part of the conductive part (6) is located between the second upper end surface (521) and the highest point of the pressure plate (4).

2. The battery module (M) according to claim 1, wherein the pressing plate (4) includes a body portion (41) and a connecting portion (42), the body portion (41) being located at an end of the cell arrangement structure (1) in a height direction (Z);

one end of the connecting part (42) is connected with the body part (41), and the other end is detachably connected with the mounting beam (52).

3. The battery module (M) according to claim 2, wherein, in the height direction (Z), the battery cell (13) of the uppermost layer has a first upper end surface (132), the body portion (41) being connected to the first upper end surface (132);

the height of the first upper end surface (132) is greater than that of the second upper end surface (521);

the connection portion (42) comprises a first connection section (421), a second connection section (422) and a transition section (423), the transition section (423) connecting the first connection section (421) and the second connection section (422);

the first connecting section (421) is connected to the body portion (41), or the first connecting section (421) is connected to the body portion (41) and the first upper end surface (132);

the second connecting section (422) is detachably connected with the second upper end surface (521).

4. The battery module (M) according to claim 3, wherein the battery cell (13) has a top cover plate (134), and the electrode terminal (131) is provided to the top cover plate (134);

along the width direction (Y), a preset distance is reserved between the top cover plate (134) and the mounting beam (52);

when the pressing plate (4) is connected with the mounting beam (52), an accommodating space (53) is enclosed by the box body (5), the mounting beam (52) and the pressing plate (4), and the conductive part (6) is located in the accommodating space (53).

5. The battery module (M) according to claim 3, wherein the body portion (41) is bonded to the first upper end surface (132);

the first connecting section (421) is lapped with the body part (41), and the lapping length of the first connecting section and the body part is 10 mm-200 mm.

6. A battery module (M) according to claim 3, characterized in that the battery module (M) comprises, in the width direction (Y), a row of the cell arrangement structure (1), the body portion (41) does not extend beyond the cell arrangement structure (1) in the width direction (Y), or;

along width direction (Y), battery module (M) includes two rows battery monomer arrangement structure (1), and two rows the electrode terminal (131) of battery monomer arrangement structure (1) deviate from each other, along width direction (Y), the one end of this part of the body (41) does not surpass one row battery monomer arrangement structure (1), and the other end does not surpass another row battery monomer arrangement structure (2).

7. The battery module (M) according to any one of claims 1 to 6, characterized in that the battery module (M) further comprises a first connecting piece (2) and a second connecting piece (3), the first connecting piece (2) and the second connecting piece (3) being connected with the electrode terminal (131) of the battery cell (13);

the conductive part (6) is connected with a first connecting sheet (2) and a second connecting sheet (3) which are connected with the dead battery cell (133);

along the height direction (Z), at least part of the first connecting piece (2) and the second connecting piece (3) is located between the second upper end surface (521) and the highest point of the pressure plate (4).

8. The battery module (M) according to claim 7, wherein, in the height direction (Z), the connection position of the conductive member (6) and the first connecting piece (2) is located between the second upper end surface (521) and the pressure plate (4), and the connection position of the conductive member (6) and the second connecting piece (3) is located between the second upper end surface (521) and the highest point of the pressure plate (4).

9. The battery module (M) according to claim 7, characterized in that the cell arrangement structure (1) comprises a first cell arrangement structure (11) and a second cell arrangement structure (12), the first cell arrangement structure (11) being located above the second cell arrangement structure (12) in the height direction (Z);

the first connecting piece (2) is connected with the single batteries (13) of the first single battery arrangement structure (11) and the single batteries (13) of the second single battery arrangement structure (12), and the second connecting piece (3) is connected with the single batteries (13) of the first single battery arrangement structure (11) and the single batteries (13) of the second single battery arrangement structure (12).

10. A device (D) using a battery cell (13) as a power source, characterized in that it comprises:

a power source for providing a driving force for the device (D); and the combination of (a) and (b),

the battery module (M) as claimed in any of claims 1 to 9 configured to provide electrical energy to the power source.

11. The failure processing method of the failed battery monomer (133) is characterized in that a battery monomer arrangement structure (1) comprises a plurality of battery monomers (13), each battery monomer (13) comprises the failed battery monomer (133), each failed battery monomer (133) comprises a positive terminal (131a) and a negative terminal (131b), an installation beam (52) is arranged at the end part of the battery monomer arrangement structure (1) in the width direction (Y), and a pressing plate (4) is arranged at the end part of the battery monomer arrangement structure (1) in the height direction (Z);

the failure processing method comprises the following steps:

-detaching at least part of the platen (4) from the mounting beam (52);

the positive electrode terminal (131a) and the negative electrode terminal (131b) of the dead battery cell (133) are electrically connected by the conductive member (6).

12. The failure handling method according to claim 11, wherein the platen (4) includes a body portion (41) and a connecting portion (42), and when at least part of the platen (4) is detached from the mounting beam (52), the failure handling method includes:

detaching the connecting portion (42) from the mounting beam (52).

13. The failure processing method according to claim 11, wherein the two electrode terminals (131) of the failed battery cell (133) are connected to the first connecting piece (2) and the second connecting piece (3), respectively, and when the positive electrode terminal (131a) and the negative electrode terminal (131b) of the failed battery cell (133) are electrically connected through the conductive member (6), the failure processing method comprises:

electrically connecting the first connection tab (2) and the second connection tab (3) connected to the failed battery cell (133) through the conductive member (6).

14. The failure processing method according to claim 11, wherein after electrically connecting the positive terminal (131a) and the negative terminal (131b) of the failed battery cell (133) through the conductive member (6), the failure processing method further comprises:

mounting at least part of the pressure plate (4) detached from the mounting beam (52) to the mounting beam (52).